Gravity feed smoker clone

Hey guys
In a few weeks I am getting ready at an attempt to build myself a gravity feed smoker. I am looking to make one about the size of the stumps XL Baby. I was wondering if anybody out there had blue prints/ plans/ pictures of one they did. Right now at this stage in my life (with wife and kids) I don't have 3k to spend on a smoker. So I figured I could save some money by doing it myself. Any help would be greatly appreciated. Thanks.